Accéder directement au contenu Accéder directement à la navigation
Nouvelle interface
Article dans une revue

Mineralogy and pore water chemistry of a boiler ash from a MSW fluidized-bed incinerator

Abstract : This paper presents an investigation of the mineralogy and pore water chemistry of a boiler ash sampled from a municipal solid waste fluidized-bed incinerator, subject to 18 months of dynamic leaching in a large percolation column experiment. A particular focus is on the redox behaviour of Cr(VI) in relation to metal aluminium Al0, as chromium may represent an environmental or health hazard. The leaching behaviour and interaction between Cr(VI) and Al0 are interpreted on the basis of mineralogical evolutions observed over the 18-month period and of saturation indices calculated with the geochemical code PhreeqC and reviewed thermodynamic data. Results of mineralogical analyses show in particular the alteration of mineral phases during leaching (e.g. quartz and metal aluminium grains), while geochemical calculations suggest equilibria of percolating fluids with respect to specific mineral phases (e.g. monohydrocalcite and aluminium hydroxide). The combination of leaching data on a large scale and mineralogical analyses document the coupled leaching behaviour of aluminium and chromium, with chromium appearing in the pore fluids in its hexavalent and mobile state once metal aluminium is no longer available for chromium reduction.
Type de document :
Article dans une revue
Liste complète des métadonnées
Contributeur : Anne-Marie Pouget Connectez-vous pour contacter le contributeur
Soumis le : mardi 30 novembre 2010 - 17:08:25
Dernière modification le : mardi 2 août 2022 - 16:13:45
Archivage à long terme le : : mardi 1 mars 2011 - 03:04:49


Fichiers produits par l'(les) auteur(s)




Françoise Bodénan, Dominique Guyonnet, Patrice Piantone, Philippe Blanc. Mineralogy and pore water chemistry of a boiler ash from a MSW fluidized-bed incinerator. Waste Management, 2010, 30 (7), p. 1280-1289. ⟨10.1016/j.wasman.2010.01.020⟩. ⟨hal-00541518⟩



Consultations de la notice


Téléchargements de fichiers